WOODWARD

1.Main Functions

1. Isochronous speed governing Maintains constant engine rotational speed under varying load conditions. Steady‑state speed accuracy reaches ±0.25% of rated speed to stabilize generator output frequency for standalone operation.
2. Magnetic pickup (MPU) speed signal sensing Receives frequency‑based pulse signal from magnetic pickup mounted on engine flywheel gear teeth, providing real‑time speed feedback for closed‑loop regulation.More products: www.plcva.com

Woodward 8290‑148 EPG Isochronous Speed Control Unit

1. PWM output for rotary actuator driving Delivers pulse‑width‑modulated power signal to directly drive the matched Woodward 4024 rotary actuator. The actuator adjusts fuel rack position to increase or decrease engine fuel supply.More products: www.plcva.com
2. Adjustable start fuel limit Equipped with potentiometer setting for maximum fuel during engine cranking. It prevents excessive fuel injection, reduces black smoke upon cold start and optimizes starting performance.
3. Gain and stability tuning Two on‑board potentiometers (Gain, Stability) allow field calibration. Users tune control loop response to eliminate speed oscillation, overshoot and hunting for different engine inertia and fuel linkage characteristics.
4. Speed‑signal‑loss fail‑safe protection If magnetic pickup signal is lost or interrupted, the controller cuts off driving output to the actuator, which reduces fuel supply and implements safety protection against runaway risk.
5. Auxiliary external input interface Provides reserved external input terminals. External load‑sensor module is required if generator paralleling and load sharing function is demanded; this controller itself does not embed native parallel‑operation logic.

Electrical characteristics: Operating supply 20‑32 VDC (nominal 24 VDC); maximum power consumption 95 W; minimum 5A battery charger is recommended for the whole system.

Woodward 8290‑148 EPG Isochronous Speed Control Unit

2. Applications & Usage

Target prime movers

Primarily applied to diesel engines. Also compatible for gas‑fueled engines and small gas turbines.

Woodward 8290‑148 EPG Isochronous Speed Control Unit

Typical application scenarios

1. Stand‑by diesel generator sets for industrial sites. Stabilizes 50 Hz / 60 Hz frequency in island (standalone) power generation mode.
2. Marine emergency diesel generator units on vessels.
3. Continuous prime‑power industrial engine installations.
4. Off‑grid stationary power generation equipment.

Woodward 8290‑148 EPG Isochronous Speed Control Unit

Mandatory system components for complete operation

1. Control unit: Woodward 8290‑148 EPG controller
2. Actuator: matched Woodward 4024 rotary electric actuator
3. Sensor: magnetic pickup (MPU) speed sensor

Woodward 8290‑148 EPG Isochronous Speed Control Unit

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More products: www.plcva.com

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